geerky42
  • geerky42
If \( \dfrac{x+2}{x(x-4)} = \dfrac{\text{A}}{x} + \dfrac{\text{B}}{x - 4}\), find \( \text{A+B} \)
Mathematics
schrodinger
  • schrodinger
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geerky42
  • geerky42
anonymous
  • anonymous
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geerky42
  • geerky42
I don't get it. Please clarify your solution. Thanks.

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anonymous
  • anonymous
It means I chose one coefficient and multiplied to the denuminator of that and then I put the root on both sides.
anonymous
  • anonymous
For example for finding out A I chose x in the denuminator then multiplied to x and then put x=0 to both sides and got A. For B is the same way.
anonymous
  • anonymous
Is it clearfied?
zepdrix
  • zepdrix
@geerky42 This is an exercise in partial fractions. Do you remember how to do those?
geerky42
  • geerky42
Sorry, I still don't get it. I mean, why does it work?
anonymous
  • anonymous
yea was gonna ask if it was a calculas problem
geerky42
  • geerky42
Partial fractions? Sorry, don't ring any bells.
geerky42
  • geerky42
So I have to use calculus to solve this problem?
anonymous
  • anonymous
actually nah just cal u have to use thsi to get integral

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